Other new features include Messages, which is current available as a beta for Lion, Reminders, Notification Center, Game Center, Notes, and more.

Apple executives showed off Mountain Lion during the company’s annual World Wide Developer Conference in June. At the time, the company said it would ship at some point in July, making the release of a GM at this time fit within that schedule. It will be available exclusively through the Mac App Store for US$19.99.

Assuming the GM release meets Apple’s requirements in the hands of developers, this will be the version that ships to the Mac App Store. If not, a second GM candidate could be released to the same process.